Thermostat Savings Calculator
The U.S. Department of Energy estimates that each degree of thermostat adjustment saves approximately 1-3% on your heating and cooling costs. Enter your current settings and energy bill to see exactly how much you could save.
How It Works
Enter your current thermostat settings for summer and winter along with your typical monthly energy bill. Then set your proposed new temperatures. The calculator applies the DOE's 1-3 percent per degree savings rule, adjusted for Central Texas climate conditions, to project your monthly and annual savings. It also estimates additional savings from away-from-home setbacks and smart thermostat scheduling.
In Texas, where HVAC accounts for roughly 50 percent of a typical home's electric bill, thermostat adjustments have an outsized impact. Raising your summer cooling setpoint from 72 to 78 degrees F saves approximately 18 percent on cooling costs alone. During a Texas summer that can mean $30-$50 per month -- without upgrading any equipment.
DOE Recommended Settings
- 78 degrees F when home
- 85 degrees F when away
- 82 degrees F when sleeping
- 68 degrees F when home
- 60 degrees F when away
- 65 degrees F when sleeping
Example Thermostat Savings
Summer: 74°F → 78°F
- Current Setting
- 74°F cooling
- New Setting
- 78°F cooling
- Degrees Changed
- +4°F
- Est. Annual Savings
- $240/year
Each degree you raise your thermostat in summer saves approximately 3% on cooling costs. 4 degrees = ~12% savings.
Winter: 72°F → 68°F
- Current Setting
- 72°F heating
- New Setting
- 68°F heating
- Degrees Changed
- -4°F
- Est. Annual Savings
- $192/year
Lowering your heating setpoint saves 1-3% per degree. Texas's mild winters mean heating costs are lower, but savings still add up.
Away Setback Savings
- Away Setting
- 85°F (summer)
- Hours Away
- ~10 hrs/day
- Method
- Smart thermostat
- Est. Annual Savings
- $504/year
Programming away-from-home setbacks is the single biggest thermostat savings strategy. Smart thermostats learn your schedule automatically.
How Thermostat Settings Affect Your Energy Bill
Your thermostat is the single most powerful tool for controlling energy costs. According to the U.S. Department of Energy, you can save approximately 1-3% on your heating and cooling bill for each degree you adjust your thermostat. In Texas, where HVAC accounts for roughly 50% of a typical home's electric bill, even small adjustments add up to significant savings over the course of a year.
DOE Recommended Thermostat Settings
The Department of Energy recommends the following settings for the best balance of comfort and energy savings:
- Summer (cooling): 78°F when home, 85°F when away, 82°F when sleeping
- Winter (heating): 68°F when home, 60°F when away, 65°F when sleeping
These recommendations may seem aggressive for Texas summers, but using ceiling fans allows you to raise the thermostat by 4°F without sacrificing comfort. Fans cost only about $0.01 per hour to operate — a fraction of what your AC uses.
Smart Thermostats: Automatic Savings
A programmable or smart thermostat automates temperature setbacks when you're away or sleeping, delivering savings without requiring you to think about it. ENERGY STAR-certified smart thermostats can save an average of 8% on heating and cooling bills — approximately $50-100 per year for a typical Texas home. Many Texas utility providers offer rebates of $25-75 on qualifying smart thermostats, making the upgrade essentially free.
Texas-Specific Considerations
Central Texas presents unique challenges for thermostat management. During summer months (June-September), outdoor temperatures regularly exceed 100°F, meaning your AC works harder to maintain any set temperature. The wider the gap between indoor and outdoor temperatures, the more energy your system uses. Setting your thermostat to 78°F instead of 72°F during a 105°F day reduces the temperature differential from 33 degrees to 27 degrees — a 20% reduction in the work your AC must perform.
Want to upgrade to a smart thermostat or need help optimizing your HVAC settings? Contact Texas Temp Masters for professional advice tailored to your home and system.
Related Resources
Related Tools
- Energy Savings Calculator — Project savings from a SEER upgrade
- Energy Cost Calculator — See how much your AC costs to run
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